Kyrgios knocks Nadal out of Wimbledon

Nick Kyrgios has beaten world number one Rafael Nadal in four sets on centre court at Wimbledon.

The 19 year old Australian, ranked 144th has progressed to the quarter finals after beating Nadal 7-6 (7-5), 5-7, 7-6 (7-5), 6-3.

His father, George Kyrgios was at the game and said watching his son play the world number one was a proud moment. "It's so hard to explain in words, the feeling just to watch him be able to match it and run Raffa around and put the pressure on him...it was Nick at his best," he says.

Kyrgios is the first player ranked outside the top 100 to defeat a world number one at a grand slam since 1992 and the first teenager to defeat the world number one at Wimbledon since Nadal himself did it against Roger Federer at Roland Garros in 2005.

Kyrgios started well and served 37 aces.

"I felt like I was at a football match the way the crowd was shouting, it was crazy," his father says.

"I don't think he knew he'd end up second week...playing Raffa...but he had a good leading tournament and he had to win eight games straight."

George Kyrgios said his son, who has been playing tennis since age four, was confident he would get through the first round, but just wanted to do his best and head into the game with the right attitude.

"He's a very confident guy, very competitive and he says 'I can do this so I'll just go out and do my best', and it seems to be working pretty well at the moment."